Improvement in gas-inhalers



UNITED STATES PATENT OFFICE.

IMPROVEM ENT IN GAS-INHALERS.

Speeilcation forming part of Letters Patent No. 55,527, dated June 12, 18Go.

To all whom it may concern:

Be it known that I, OUTHBERT LANDEETH `MUNNs, of Philadelphia, in the county ot' Phil adelphia, in the Stategof Pennsylvania, have invented a new Double-Valved Self-Adjusting Safety Gas-Inhaler, for the purpose of introducing b v inhalation into the human lungs nitrous oxide or other gases in all their purity, and free from carbonio or other noxious gases exhaled or emitted from the lungs, which, Without my invention, would 110W back into the gas receiver or holder; and I do hereby declare that the following is a full and exact description thereof, reference being had to the aeconr panying drawing and letters of reference marked thereon.

My invention consists in the employment of a hollow tube for inhaling gas having a ballvalve on its side and a reversible plug containing a ball-valve near 011e end of theV tube, by means of which the gas may be inhaled from the gas-receiver, and when eXha-lation takes place the carbonio or other noxious gases from the lungs are made to pass out of the valve in the side of the tube, in order to pre serve the purity of the gas in the receiver, and by turning the plug all communication can be cutoff between the mouth and the gasreceiver, and further inhalation of the gas be immediately stopped. A

In the drawings, the figure represents the tube complete.

C is the mouth-piece, and D the part entering the gas-holder. E is a plug iitting accurately the plug-hole I, and having a ball-valve, L, Working in the valve-seat K, and having a valve-pin, M, across the valve-seat, to prevent the ball-valve from rising too high above itS seat. 0 is a ball-valve operating in front of the plug in its valve-seat N, and P is a perl'orated cap fastened over the top of the valveseat N.

The operation is as follows: The end C is applied to the mouth, and the reversible plug turned so that the ball-valve and its seat will be in the line ot' the tube. Inhalation will cause the ballvalve in the plug to rise from its seat, and the gas will pass into the mouth and lungs. Vhen exhalation takes place the valve iu the plug will be closed and the ballvalve O Will open and allow the exhalations from the lungs to pass into the open air and preserve the purity of the gas. Y

The action of the valves when the plug is turned, as described, will beantomatic, and thus possess decided advantages over those inhalers in which the valve in the side of the tube for the passage of the exhalations from the lungs is opera-ted by hand.

By turning the plug-valve all communication With the gas can be cut off, and all danger from inhaling too much gas can be prevented. Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The hollow tube C, in combination With the reversible plug, with its ball-valve, and the ball-valve 0, the whole being constructed and operated substantially in the manner and for the purpose set forth.

GUTHBER'I L. MUNNS. Witnesses:

J. H. BRYAN, i J AMEs MGGAHEN. 

